/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.linkis.cli.common.entity.var;

/**
 * @program: linkis-cli
 * @description: Retrieve value from input command/config/sys_prop/sys_env etc. order should be:
 *     command > user config > default config > default
 */
public interface VarAccess {

  void checkInit();

  <T> T getVar(Class<T> clazz, String key);

  <T> T getVarOrDefault(Class<T> clazz, String key, T defaultValue);

  boolean hasVar(String key);

  String[] getAllVarKeys();
}
